[Observium] New install problems

I have done a new install on a Freebsd box using the instructions here: http://www.observium.org/wiki/FreeBSD_SVN_Installation

I have everything installed, but when I go to the webpage I run into this:

*Fatal error*: Call to undefined function simplexml_load_string() in * /usr/local/share/observium/includes/definitions.inc.php* on line *1144* * *

I do show the xml.so extension installed in php.

Any ideas what to check? No errors show up in the logs. * * * *